This page lists some common control icons and their uses.
http://www.computerhope.com/help/monitor.htm
In general, you should find a menu, a control to select an item, and a
control to adjust the item selected up or down (Higher or lower). There
should also be a control to exit the menu, but most such menus will
auto-disappear after a short period of time.
A little experimentation will do no harm, and will yield results in
short order.

Lee Hatch wrote:
> I have Dell XP with an older style monitor (not thin) Under the logo it has four buttons. How can I use them to change things on my desktop? Thanks for your counsel. Lee
>
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